I like so much about this shot. The critters are great and the tree adds some serious character to the shot. IMO too much tree though my guess is that there was something below them that required the framing this way, but just my opinion a little less tree.
Cool shot of Meercats. I do feel that there is too much negative space above them and the tree atcually draws the eyes upwards and away from you subjects.
Very nice idea. I love the sense of scale. The crop is a little awkward. It would be nice to have some space between the animals and the bottom of the photograph.